Fiber Optic LAN Components HFE408x-321 High Speed VCSEL 1.25Gbps FEATURES Designed for drive currents between 5 and 15 mA Optimized for low dependence of electrical properties over temperature High speed 1 GHz Two different laser/ photodiode polarities Attenuating coating Packaged with a photodetector The HFE408x-321 is a high-performance 850 nm VCSEL (Vertical Cavity Surface-Emitting Laser) packaged for high-speed data communications. This product combines all the performance advantages of the VCSEL with a custom designed power monitor diode. The power monitor diode can be used with appropriate feedback control circuitry to set a maximum power level for each VCSEL. In addition, built-in power attenuation reduces the effective slope efficiency. These combined features simplify design for high data rate LASER RADIATION communication and eye safety. AVOID EXPOSURE TO BEAM CLASS 3B LASER PRODUCT The HFE408x-321 is a high radiance VCSEL designed to convert electrical current into optical power that can be used in fiber optic communications and other applications. As the current varies above threshold, the light intensity increases proportionally. The HFE408x-321 is designed to be used with inexpensive silicon or gallium arsenide detectors, but excellent performance can also be achieved with some indium gallium arsenide detectors. The low drive current requirement makes direct drive from PECL (Positive Emitter Coupled Logic) or EML (Emitter Coupled Logic) gates possible and eases driver design. The HFE408x-321 is designed to interface with 50/125 and 62.5/125 m multimode fiber. They product circularly symmetric, non-astigmatic, narrow divergence beams that, with appropriate lensing, fiber couple all of the emitter power. Honeywell www.honeywell.com/sensing/VCSELHFE408x-321 Fiber Optic LAN Components High Speed VCSEL 1.25Gbps ABSOLUTE MAXIMUM RATINGS NOTICE Parameter Rating Stresses greater than those listed under Storage Temperature -40 to +125C Absolute Maximum Ratings may cause Operating Temperature 0 to +70C permanent damage to the device. This is a stress rating only and functional Lead Solder Temperature 260C, 10 sec. operation of the device at these or any Continuous Optical Output Power (Any Current) 5 mW other conditions above those indicated in 5 V Laser Diode Reverse Voltage (I =10 A) R the operations section for extended periods of time may affect reliability. Laser Continuous Forward Current, Heat-Sinked 15 mA PIN Photodiode Forward Current 10 mA o ELECTRO-OPTICAL CHARACTERISTICS (T =25 C unless otherwise stated) A VCSEL Parameters Test Condition Symbol Min. Typ. Max. Units Notes Peak Operating Current Adjustable to establish I 12 20 mA 1 peak operating power Optical Power Output I =12mA Po 0.3 0.6 1.2 mW 1 F Threshold Current I 1.5 3.5 6 mA TH o o Threshold Current T = 0 C to 70 C -1.5 1.5 mA 2 I A TH Temperature Variation Slope Efficiency Po =0.5mW 0.04 0.1 0.16 mW/mA 3 o o o Slope Efficiency T = 0 C to 70 C -0.5 %/ C / T A Temperature variation Peak Wavelength I =12mA 830 850 860 nm F P o I =12mA 0.06 nm/ C Temperature Variation T P F P/ Spectral Bandwidth, RMS I =12mA 0.85 nm F Laser Forward Voltage I =12 mA V 1.6 1.8 2.2 V F F Laser Reverse Voltage 510 V I =10 A BVR LD R Rise and Fall Times Prebias Above t 150 300 ps 4 r Threshold, 20%-80% t 200 300 f Relative Intensity Noise 1 GHz BW, I =12mA RIN -128 -122 dB/Hz F Series Resistance I =12 mA R 18 25 40 Ohms F S Beam Divergence I =12 mA 5 15 20 Degrees 5 F Photodiode Parameters Test Condition Symbol Min. Typ. Max. Units Notes Monitor Current Po =0.5mW I 0.075 0.250 mA PD o Monitor current Po =0.5mW 0.2 %/ C I / T PD Temperature Variation Dark Current Po =0mW, V =3V I 20 nA R D PD Reverse Voltage Po =0mW, I =10 A BVR 30 115 V 6 PD R PD Capacitance V =0V, Freq=1MHz C75 100 pF R V =3V, Freq=1MHz 40 55 R 2 Honeywell For application help: call 1-800-537-6945 www.honeywell.com/sensing/VCSEL